Improvement in modes of dressing millstones



W. J. MERRITT. MODE OF DRESSING MILL-STONES. N o.173.733-

Pa tented' Feb. 22, 1876.-

M 4 I .uw r v A UNITED STATES PATENT CFFICE.

WILLIAM J. MERRITT, OF BARDOLPH, ILLINOIS.

IMPROVEMENT IN MODES OF DRESSING MILLSTONES.

Specification forming part of Letters Patent N 0. 173,733, datedFebruary 22, 1876; application filed December 2, 1875.

To all whom it may concern:

Be it known that I, WILLIAM J. MERRITT, of Bardolph, in the county ofMcDonough and State of Illinois, have invented a new and use:

with a hoop, a cylinder fitted in the eye of the upper stone, providedwith a plug, as hereinafter fully explained.

In the drawings, A A represent the upper.

stone or runner, in the eye of which is inserted a tapered cylinder, 8,in which is fitted an airit tight plug, 01. BB represent the bed-stone,

around which is placed the hoop G. sents the spindle, and t the yoke.

The operation is as follows: The hoop C is placed around the bed-stoneB, as shown in Fig. 1, and is made water-tight by any suitable means.The cylinder sis inserted in the eye of the upper stone A, and is fittedwith any suitable packing that will make it airtight. The plug 01 isthen withdrawn and water poured in through thecylinder 8 into i repretheeye of the stone until it is three or four inches deep in the hoop O."The plug dis then inserted into the cylinder 8, which is to prevent anyair from getting in at the eye of the I stone. The upperstone A is thenput in motion by the usual means, and its whole weight is let down onthe bed-stone, and they are allowed to run in this manner until the faceof each stone is ground perfectly true.

The water prevents the stones from heating, and also washes out all thegummy substance that commonly adheres to the stones.

The pipe to is to let out the water after the operation is over.

By this mode of dressing millstones the face of each stone is madeperfectly true, and the edges of the grooves and cellular portions ofthe stones are sharpened, and made ready for grinding without the use ofthe common pick Having thusfully described my invention, what I claim asnew, and desire to secure by Letters Patent, is

1. The bed-stone B, provided with the water-tight hoop G, for holdingwater around the stones while in the act of dressing, substantialiy asand for the purpose set forth.

2. In combination with the bed-stone B and hoop U, the cylinder 8 andplug 01, all operating substantially as described, for the purposespecified.

, WM. J. MERRITT. Witnesses:

THos. J. PRICE, W. T. PRIcE.

